Schneider Electric SSD1A320BDC1 Harmony SSD1 20A 4-32V DC In 48-600V AC Out Solid State Relay

The Schneider Electric SSD1A320BDC1 is a Harmony SSD1 DIN rail solid state relay rated 20 A with zero-voltage switching, a 4-32 V DC control input, and a 48-600 V AC load output. It mounts on 35 mm DIN rail, switches loads up to 2.24 kW/3 hp at 480 V AC, and carries a 600 V insulation rating.

Technical Specifications

Certifications & Standards

• UL
• CSA
• UL 508
• CSA C22.2 No 14-13
• IEC 61373 Class B category 1
• IEC 60947-4-3
• IEC 62314
• IEC 60950-1

Selection Notes

SSD1A320BDC1 switches loads up to 2.24 kW/3 hp at 480 V AC; step up to the 35 A SSD1 relay in the same range when higher motor power is needed in the same 22.5 mm DIN rail footprint. Zero-voltage switching turns the SCR on only at the AC waveform's zero crossing, which limits inrush-related EMI compared with random-turn-on switching - relevant when driving resistive heating loads. The 4-32 V DC control input takes a PLC discrete output directly without an interposing relay.